const util = require('../../../../utils/util.js')
import { list, del } from '../../../../api/account'
var app = getApp();
Page({
  data: {
    delBtnWidth: 180,
    startX: "",
    list: [],
    pageNum:1,
    pageSize:10,
  },
  onLoad: function (options) {
    this.initEleWidth();
  },
  onShow: function () {
    this.loadList()
  },
  touchS: function (e) {
    if (e.touches.length == 1) {
      this.setData({
        //设置触摸起始点水平方向位置
        startX: e.touches[0].clientX
      });
    }
  },
  touchM: function (e) {
    if (e.touches.length == 1) {
      //手指移动时水平方向位置
      var moveX = e.touches[0].clientX;
      //手指起始点位置与移动期间的差值
      var disX = this.data.startX - moveX;
      var delBtnWidth = this.data.delBtnWidth;
      var txtStyle = "";
      if (disX == 0 || disX < 0) {//如果移动距离小于等于0，说明向右滑动，文本层位置不变
        txtStyle = "left:0px";
      } else if (disX > 0) {//移动距离大于0，文本层left值等于手指移动距离
        txtStyle = "left:-" + disX + "px";
        if (disX >= delBtnWidth) {
          //控制手指移动距离最大值为删除按钮的宽度
          txtStyle = "left:-" + delBtnWidth + "px";
        }
      }
      //获取手指触摸的是哪一项
      var index = e.currentTarget.dataset.index;
      var list = this.data.list;
      list[index].txtStyle = txtStyle;
      //更新列表的状态
      this.setData({
        list: list
      });
    }
  },
  touchE: function (e) {
    if (e.changedTouches.length == 1) {
      //手指移动结束后水平位置
      var endX = e.changedTouches[0].clientX;
      //触摸开始与结束，手指移动的距离
      var disX = this.data.startX - endX;
      var delBtnWidth = this.data.delBtnWidth;
      //如果距离小于删除按钮的1/2，不显示删除按钮
      var txtStyle = disX > delBtnWidth / 2 ? "left:-" + delBtnWidth + "px" : "left:0px";
      //获取手指触摸的是哪一项
      var index = e.currentTarget.dataset.index;
      var list = this.data.list;
      list[index].txtStyle = txtStyle;
      //更新列表的状态
      this.setData({
        list: list
      });
    }
  },
  //获取元素自适应后的实际宽度
  getEleWidth: function (w) {
    var real = 0;
    try {
      var res = wx.getSystemInfoSync().windowWidth;
      var scale = (750 / 2) / (w / 2);//以宽度750px设计稿做宽度的自适应
      real = Math.floor(res / scale);
      return real;
    } catch (e) {
      return false;
    }
  },
  initEleWidth: function () {
    var delBtnWidth = this.getEleWidth(this.data.delBtnWidth);
    this.setData({
      delBtnWidth: delBtnWidth
    });
  },
  delItem: function (e) {
    var _this = this
    var index = e.currentTarget.dataset.index;
    var list = _this.data.list;
    del(list[index].id).then(res => {
      list.splice(index, 1);
      _this.setData({
        list: list
      });
    })
  },
  loadList() {
    let _this = this
    let params ={
      pageNum:_this.data.pageNum,
      pageSize:_this.data.pageSize
    }
    list(params).then(res => {
      res.data.forEach(item=>{
        _this.data.list.push(item)
      })
      _this.setData({
        list: _this.data.list
      })
    })
  },
  addNewCard(){
    wx.navigateTo({
      url: '/pages/functions/jumpPage/collectionCode/index',
  })
  },
  onPullDownRefresh(){
    this.data.pageNum = 1
    let settime = setTimeout(() => {
      wx.hideNavigationBarLoading()
      this.loadList()
      wx.stopPullDownRefresh()
      clearTimeout(setTimeout)
    }, 1000);
    this.loadList()
  },
  onReachBottom() {
    this.data.pageNum += 1
    this.loadList()
  },
})